<?php

	require_once('../../../config.php');
	require_once($CFG->dirroot.'/lib/statslib.php');
	require_once($CFG->libdir.'/adminlib.php');

	$report	 = optional_param('report', STATS_REPORT_ACTIVE_COURSES, PARAM_INT);
	$time	   = optional_param('time', 0, PARAM_INT);
	$numcourses = optional_param('numcourses', 20, PARAM_INT);

	admin_externalpage_setup('reportcourseoverview');
	admin_externalpage_print_header();

	if (empty($CFG->enablestats)) {
		if (has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
			redirect("$CFG->wwwroot/$CFG->admin/settings.php?section=stats", get_string('mustenablestats', 'admin'), 3);
		} else {
			error("Stats is not enabled.");
		}
	}

	$course = get_site();
	stats_check_uptodate($course->id);

	$strreports = get_string('reports');
	$strcourseoverview = get_string('courseoverview');

	$reportoptions = stats_get_report_options($course->id,STATS_MODE_RANKED);

	$tableprefix = $CFG->prefix.'stats_';

	$earliestday = get_field_sql('SELECT timeend FROM '.$tableprefix.'daily ORDER BY timeend');
	$earliestweek = get_field_sql('SELECT timeend FROM '.$tableprefix.'weekly ORDER BY timeend');
	$earliestmonth = get_field_sql('SELECT timeend FROM '.$tableprefix.'monthly ORDER BY timeend');

	if (empty($earliestday)) $earliestday = time();
	if (empty($earliestweek)) $earliestweek = time();
	if (empty($earliestmonth)) $earliestmonth = time();

	$now = stats_get_base_daily();
	$lastweekend = stats_get_base_weekly();
	$lastmonthend = stats_get_base_monthly();

	$timeoptions = stats_get_time_options($now,$lastweekend,$lastmonthend,$earliestday,$earliestweek,$earliestmonth);

	if (empty($timeoptions)) {
		print_error('nostatstodisplay', "", $CFG->wwwroot.'/course/view.php?id='.$course->id);
	}

	echo '<form action="index.php" method="post">'."\n";
	echo '<div>';

	$table->width = '*';
	$table->align = array('left','left','left','left','left','left');
	$table->data[] = array(get_string('statsreporttype'),choose_from_menu($reportoptions,'report',$report,'','','',true),
						   get_string('statstimeperiod'),choose_from_menu($timeoptions,'time',$time,'','','',true),
						   '<input type="text" name="numcourses" size="3" maxlength="2" value="'.$numcourses.'" />',
						   '<input type="submit" value="'.get_string('view').'" />') ;

	print_table($table);
	echo '</div>';
	echo '</form>';

	print_heading($reportoptions[$report]);


	if (!empty($report) && !empty($time)) {
		$param = stats_get_parameters($time,$report,SITEID,STATS_MODE_RANKED);
		if (!empty($param->sql)) {
			$sql = $param->sql;
		} else {
			$sql = "SELECT courseid,".$param->fields." FROM ".$CFG->prefix.'stats_'.$param->table
				." WHERE timeend >= $param->timeafter AND stattype = 'activity' AND roleid = 0"
				." GROUP BY courseid "
				.$param->extras
				." ORDER BY ".$param->orderby;
		}
		error_log($sql);

		$courses = get_records_sql($sql, 0, $numcourses);

		if (empty($courses)) {
			notify(get_string('statsnodata'));echo '</td></tr></table>';echo '<p>after notify</p>';

		} else {
			if (empty($CFG->gdversion)) {
				echo '<div class="graph">(' . get_string("gdneed") .')</div>';
			} else {
				echo '<div class="graph"><img alt="'.get_string('courseoverviewgraph').'" src="'.$CFG->wwwroot.'/'.$CFG->admin.'/report/courseoverview/reportsgraph.php?time='.$time.'&report='.$report.'&numcourses='.$numcourses.'" /></div>';
			}

			$table = new StdClass;
			$table->align = array('left','center','center','center');
			$table->head = array(get_string('course'),$param->line1);
			if (!empty($param->line2)) {
				$table->head[] = $param->line2;
			}
			if (!empty($param->line3)) {
				$table->head[] = $param->line3;
			}

			foreach  ($courses as $c) {
				$a = array();
				$a[] = '<a href="'.$CFG->wwwroot.'/course/view.php?id='.$c->courseid.'">'.get_field('course','shortname','id',$c->courseid).'</a>';

				$a[] = $c->line1;
				if (isset($c->line2)) {
					$a[] = $c->line2;
				}
				if (isset($c->line3)) {
					$a[] = round($c->line3,2);
				}
				$table->data[] = $a;
			}
			print_table($table);
		}
	}
	admin_externalpage_print_footer();

?>
